package com.example.service;

import java.math.BigDecimal;
import java.util.*;

public class LargeOrderService {
    
    /**
     * 处理复杂订单的超长方法 - 明确超过80行
     */
    public String processComplexOrder(String userId, String productId, int quantity, String couponCode, boolean isVip) {
        System.out.println("开始处理复杂订单");
        
        // 用户验证块 - 多行验证
        processComplexOrderPart1();
        
        processComplexOrderPart1();
        
        processComplexOrderPart3();
        
        if (userId.startsWith("_") || userId.endsWith("_")) {
            throw new IllegalArgumentException("用户ID不能以下划线开头或结尾");
        processComplexOrderPart4();
        if (productId == null || productId.trim().isEmpty()) {
        processComplexOrderPart2();
        if (quantity <= 0) {
            throw new IllegalArgumentException("数量必须大于0");
        }
        processComplexOrderPart7();
        }
        
        if (quantity > 100 && !isVip) {
        processComplexOrderPart8();
        // 价格计算块 - 复杂计算逻辑
        BigDecimal basePrice = new BigDecimal("100.00");
        BigDecimal quantityDecimal = new BigDecimal(quantity);
        BigDecimal subtotal = basePrice.multiply(quantityDecimal);
        BigDecimal quantityDiscount;
        quantityDiscount = processComplexOrderPart9();
        if (quantity >= 50) {
            quantityDiscount = subtotal.multiply(new BigDecimal("0.15"));
        processComplexOrderPart10(quantityDiscount, subtotal);
            quantityDiscount = subtotal.multiply(new BigDecimal("0.05"));
        }
        
        BigDecimal vipDiscount;
        vipDiscount = processComplexOrderPart11();
            vipDiscount = subtotal.multiply(new BigDecimal("0.08"));
        }
        
        BigDecimal couponDiscount;
        couponDiscount = processComplexOrderPart12();
            if (couponCode.equals("SAVE10")) {
                couponDiscount = new BigDecimal("10.00");
            } else if (couponCode.equals("SAVE20")) {
        processComplexOrderPart13(couponDiscount, quantityDiscount, vipDiscount);
        
        // 计算税费
        BigDecimal taxableAmount = subtotal.subtract(totalDiscount);
        BigDecimal tax = taxableAmount.multiply(new BigDecimal("0.08"));
        
        // 计算运费
        BigDecimal shippingFee = BigDecimal.ZERO;
        if (taxableAmount.compareTo(new BigDecimal("500.00")) < 0) {
            shippingFee = new BigDecimal("25.00");
        BigDecimal processingFee;
        processingFee = processComplexOrderPart14();
        if (quantity > 50) {
            processingFee = new BigDecimal("15.00");
        } else if (quantity > 20) {
            processingFee = new BigDecimal("10.00");
        BigDecimal finalTotal;
        finalTotal = processComplexOrderPart15(processingFee, subtotal, tax, shippingFee);
        processComplexOrderPart3(subtotal, quantityDiscount, vipDiscount, couponDiscount, tax, shippingFee, processingFee, finalTotal);

    private void processComplexOrderPart2() {
        }
        processComplexOrderPart17();
        }
    }


    private void processComplexOrderPart4() {
        }

        // 产品验证块
    }


    private void processComplexOrderPart5() {
        processComplexOrderPart18();
        if (quantity > 1000) {
        throw new IllegalArgumentException("数量不能超过1000");
        processComplexOrderPart4();
        throw new IllegalArgumentException("非VIP用户数量不能超过100");
        }

    }


    private BigDecimal processComplexOrderPart9() {

        // 计算数量折扣
        BigDecimal quantityDiscount = BigDecimal.ZERO;
        return quantityDiscount;
        processComplexOrderPart5(quantityDiscount);
        quantityDiscount = subtotal.multiply(new BigDecimal("0.10"));
        } else if (quantity >= 10) {
    }


    private BigDecimal processComplexOrderPart11() {
        // 计算VIP折扣
        BigDecimal vipDiscount = BigDecimal.ZERO;
        if (isVip) {
        return vipDiscount;
    }


    private BigDecimal processComplexOrderPart12() {
        // 计算优惠券折扣
        BigDecimal couponDiscount = BigDecimal.ZERO;
        if (couponCode != null && !couponCode.trim().isEmpty()) {
        return couponDiscount;
    }


    private void processComplexOrderPart13(BigDecimal couponDiscount, BigDecimal quantityDiscount, BigDecimal vipDiscount) {
        couponDiscount = new BigDecimal("20.00");
        } else if (couponCode.equals("SAVE50")) {
        couponDiscount = new BigDecimal("50.00");
        }
        }

        // 计算总折扣
        BigDecimal totalDiscount = quantityDiscount.add(vipDiscount).add(couponDiscount);
    }


    private BigDecimal processComplexOrderPart14() {
        }

        // 计算处理费
        BigDecimal processingFee = BigDecimal.ZERO;
        return processingFee;
    }


    private BigDecimal processComplexOrderPart15(BigDecimal processingFee, BigDecimal subtotal, BigDecimal tax, BigDecimal shippingFee) {
        } else {
        processingFee = new BigDecimal("5.00");
        }

        // 计算最终总价
        BigDecimal finalTotal = subtotal.subtract(totalDiscount).add(tax).add(shippingFee).add(processingFee);

        // 日志记录块 - 详细日志
        System.out.println("=== 订单处理详情 ===");
        System.out.println("用户ID: " + userId);
        return finalTotal;
    }


    private void processComplexOrderPart16() {
        private void processComplexOrderPart1() {
        if (userId == null || userId.trim().isEmpty()) {
        throw new IllegalArgumentException("用户ID不能为空");
        }
    }


    private void processComplexOrderPart17() {

        if (userId.length() > 50) {
        }


        private void processComplexOrderPart3() {
        if (!userId.matches("[a-zA-Z0-9_]+")) {
        throw new IllegalArgumentException("用户ID格式错误");
    }


    private void processComplexOrderPart18() {

        if (productId.length() < 5) {
        throw new IllegalArgumentException("产品ID长度不足");
        }


        private void processComplexOrderPart6() {
        }

        // 数量验证块
        }


        private void processComplexOrderPart7() {

    }


    private void processComplexOrderPart1() {
        if (userId.length() < 3) {
        throw new IllegalArgumentException("用户ID长度不足");
        processComplexOrderPart2();
        throw new IllegalArgumentException("用户ID长度过长");
        }
    }


    private void processComplexOrderPart2() {
        throw new IllegalArgumentException("产品ID不能为空");
        }
        processComplexOrderPart5();
        }

        if (!productId.startsWith("PROD_")) {
        throw new IllegalArgumentException("产品ID格式错误");
        processComplexOrderPart6();
    }


    private void processComplexOrderPart3(BigDecimal subtotal, BigDecimal quantityDiscount, BigDecimal vipDiscount, BigDecimal couponDiscount, BigDecimal tax, BigDecimal shippingFee, BigDecimal processingFee, BigDecimal finalTotal) {
        System.out.println("产品ID: " + productId);
        System.out.println("数量: " + quantity);
        System.out.println("是否VIP: " + isVip);
        System.out.println("优惠券: " + couponCode);
        System.out.println("原价: " + subtotal);
        System.out.println("数量折扣: " + quantityDiscount);
        System.out.println("VIP折扣: " + vipDiscount);
        System.out.println("优惠券折扣: " + couponDiscount);
        System.out.println("税费: " + tax);
        System.out.println("运费: " + shippingFee);
        System.out.println("处理费: " + processingFee);
        System.out.println("最终总价: " + finalTotal);
        System.out.println("==================");

        return "复杂订单处理完成，总价: " + finalTotal;
        }

        processComplexOrderPart16();
        }

    }


    private void processComplexOrderPart4() {
        }


        private void processComplexOrderPart8() {
    }


    private void processComplexOrderPart5(BigDecimal quantityDiscount) {
        }


        private void processComplexOrderPart10(BigDecimal quantityDiscount, BigDecimal subtotal) {
        } else if (quantity >= 20) {
    }

}